CN112684654B - Optical assembly and projection equipment - Google Patents
Optical assembly and projection equipment Download PDFInfo
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- CN112684654B CN112684654B CN202110276954.5A CN202110276954A CN112684654B CN 112684654 B CN112684654 B CN 112684654B CN 202110276954 A CN202110276954 A CN 202110276954A CN 112684654 B CN112684654 B CN 112684654B
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Abstract
The present disclosure provides an optical assembly and a projection apparatus, the optical assembly includes a rotation assembly, an optical lens and a driving assembly; the rotating assembly comprises a first shell and a rotating member positioned in the first shell, the rotating member is rotatably connected with the first shell, the driving assembly comprises a second shell, the rotating assembly is positioned in the second shell, and the rotating assembly is rotatably connected with the driving assembly through the rotating member. According to the optical assembly, the first shell is provided with the at least one stress member, the second shell is provided with the at least one driving member, the rotating assembly rotates by taking the first direction or/and the second direction as an axis through the stress member and the driving member, and the rotating member simultaneously supports and rotates the optical assembly, so that the technical problem that the existing optical assembly is poor in transmission precision is solved.
Description
Technical Field
The present disclosure relates to the field of projection technologies, and in particular, to an optical assembly and a projection apparatus.
Background
The existing laser projection equipment expands a low-resolution picture to a high-resolution picture through a galvanometer so as to improve the picture quality of a projection picture.
In the existing optical assembly, a coil fixedly arranged on a base is generally electrified to generate a magnetic field, so that a driving magnet arranged on a lens is driven, and the lens is driven to displace to generate required vibration. For example, when the optical lens in the optical assembly is a galvanometer, the supporting structure of the galvanometer is mostly fixed by using a reed and a screw, and the transmission precision of the galvanometer is affected by the forming tolerance and the assembling tolerance of the supporting structure of the reed; and in the case of a drop or impact, it is liable to cause permanent deformation and even breakage of the reed.
Therefore, an optical assembly and a projection apparatus are needed to solve the above technical problems.
Disclosure of Invention
The present disclosure provides an optical assembly and a projection apparatus to improve the technical problem of poor transmission precision of the existing optical assembly.
In order to solve the above problems, the technical solution provided by the present disclosure is as follows:
the present disclosure provides an optical assembly comprising a rotation assembly, an optical lens on the rotation assembly, and a drive assembly that drives the rotation assembly and the optical lens to rotate;
the rotating assembly comprises a first shell and a rotating member, wherein the rotating member is positioned in the first shell and is rotationally connected with the first shell, and the rotating assembly also comprises at least a first stress member and a second stress member which are positioned on the first shell;
the drive assembly comprises a second housing, the rotating assembly is positioned in the second housing, the rotating assembly is rotatably connected with the drive assembly through the rotating member, and the drive assembly also comprises at least a first drive member and a second drive member which are positioned on the second housing;
wherein the first force-receiving member corresponds to the first driving member, the second force-receiving member corresponds to the second driving member, the rotating assembly rotates about a first direction as an axis by the first force-receiving member and the first driving member, the rotating assembly rotates about a second direction as an axis by the second force-receiving member and the second driving member, and the first direction is not parallel to the second direction.
Optionally, the first housing comprises a first cavity comprising a first opening at a first side of the first housing, the rotating member being located within the first cavity;
the first shell further comprises a second opening located on the second side of the first shell and a third opening located in the second opening, the optical lens is located in the second opening, an orthographic projection area of the second opening and the orthographic projection area of the third opening on the first opening are located in the first opening, and a projection area of the third opening on the first opening is smaller than a projection area of the second opening on the first opening.
Optionally, the rotating member includes two first side plates disposed along the first direction and two second side plates disposed along the second direction, the two first side plates are disposed opposite to each other, the two second side plates are disposed opposite to each other, and any two first side plates and any two second side plates are fixedly connected;
the first side plate is provided with a first rotating device, the second side plate is provided with a second rotating device, the rotating member is rotationally connected with the first shell or the second shell along the first direction through the two first rotating devices, and the rotating member is rotationally connected with the first shell or the second shell along the second direction through the two second rotating devices.
Optionally, the first force-bearing member and the second force-bearing member are fixed to a rotating side plate of the first housing, one first force-bearing member corresponds to one first rotating device, one second force-bearing member corresponds to one second rotating device, and the first force-bearing member and the second force-bearing member are located between the first housing and the second housing;
wherein the first force receiving member is disposed apart from the first driving member, the second force receiving member is disposed apart from the second driving member, and a distance between the first force receiving member and the first driving member is equal to a distance between the second force receiving member and the second driving member.
Optionally, in the first direction, the two first rotating means are one of facing a first groove within the first cavity or facing a first protrusion outside the first cavity;
in the second direction, the two second rotation means are one of facing a second groove within the first cavity or facing a second protrusion outside the first cavity.
Optionally, at least one set of two of the first rotating means or two of the second rotating means is a protrusion facing out of the first cavity.
Optionally, when the first rotating device faces a first groove in the first cavity, the first housing further includes a first butt groove corresponding to the first groove, the first butt groove is embedded in the first groove, and the first groove is rotatably connected to the first butt groove;
or, when the second rotating device faces the second groove in the first cavity, the first housing further includes a second butt groove corresponding to the second groove, the second butt groove is embedded in the second groove, and the second butt groove is rotatably connected to the second groove.
Optionally, the second housing further comprises a second cavity, the rotating assembly being located within the second cavity;
wherein, at least one first baffle plate positioned between the first shell and the rotating component is also arranged in the second cavity, and the first baffle plate is fixedly connected with the second shell;
in the first direction, a first butt joint bulge corresponding to the first bulge is arranged on the first baffle plate, the first bulge is embedded in the first butt joint bulge, and the first bulge is rotatably connected with the first butt joint bulge;
or, in the second direction, a second butting protrusion corresponding to the second protrusion is arranged on the first baffle plate, the second protrusion is embedded in the second butting protrusion, and the second protrusion is rotatably connected with the second butting protrusion.
Optionally, the rotating member further comprises a first limiting member located on the first side plate and a second limiting member located at an intersection area of the first side plate and the second side plate, the first limiting member faces the first housing, the second limiting member faces the second housing, and the orientation of the first limiting member is parallel to the orientation of the second limiting member.
Optionally, a vertical distance between the first limiting member and the first housing is a first distance, a vertical distance between the second limiting member and the second housing is a second distance, and the first distance is not equal to the second distance.
Optionally, the second housing further includes at least two embedded holes located on the second housing, the first driving member and the second driving member are embedded in the embedded holes, and the first driving member and the second driving member are fixedly connected to the second housing through the embedded holes.
Optionally, centers of the first driving member, the first force receiving member, and the first rotating means are located on a first straight line, centers of the second driving member, the second force receiving member, and the second rotating means are located on a second straight line, the first straight line is parallel to the first direction, and the second straight line is parallel to the second direction.
Optionally, the driving assembly further includes a flexible circuit board attached to the second housing, the flexible circuit board includes a bottom plate located on a side of the second housing away from the optical lens and at least two attachment plates located on outer sides of the bottom plate, the attachment plates are attached to the side housing of the second housing, and the attachment plates cover the first driving member and the second driving member;
wherein, the height of at least one of the fitting plates exceeds the height of the second shell.
Optionally, the material strength of the rotating member is less than or equal to the material strength of the first housing or/and the second housing; alternatively, the material density of the rotating member is less than or equal to the material density of the first housing or/and the second housing.
Optionally, the first and second drive members comprise metal coils for generating a magnetic field, and the first and second force-bearing members comprise permanent magnets.
The present disclosure also proposes a projection device, wherein the projection device comprises the above optical assembly.
Has the advantages that: the present disclosure provides an optical assembly and a projection apparatus, the optical assembly includes a rotation assembly, an optical lens and a driving assembly; the rotating assembly comprises a first shell and a rotating member positioned in the first shell, the rotating member is rotatably connected with the first shell, the driving assembly comprises a second shell, the rotating assembly is positioned in the second shell, and the rotating assembly is rotatably connected with the driving assembly through the rotating member. According to the optical assembly, the first shell is provided with the at least one stress member, the second shell is provided with the at least one driving member, the rotating assembly rotates by taking the first direction or/and the second direction as an axis through the stress member and the driving member, and the rotating member simultaneously supports and rotates the optical assembly, so that the technical problem that the existing optical assembly is poor in transmission precision is solved.
Drawings
The technical solutions and other advantages of the present disclosure will become apparent from the following detailed description of specific embodiments of the present disclosure, which is to be read in connection with the accompanying drawings.
FIG. 1 is a first perspective view of an optical assembly according to the present disclosure;
FIG. 2 is a second perspective view of the optical assembly of the present disclosure;
FIG. 3 is a third perspective view of the optical assembly of the present disclosure;
FIG. 4 is a fourth perspective view of the optical assembly of the present disclosure;
FIG. 5 is an exploded view of an optical assembly of the present disclosure;
FIG. 6 is a cross-sectional view of section AA in FIG. 3 of the present disclosure;
FIG. 7 is a cross-sectional view of section BB of FIG. 3 of the present disclosure;
FIG. 8 is an enlarged view of region G of FIG. 6 of the present disclosure;
fig. 9 is an enlarged view of region H of fig. 7 of the present disclosure.
Description of reference numerals:
100-a rotating assembly; 200-a drive assembly; 300-an optical lens; 400-an optical component;
10-a first housing; 110-a force-receiving member; 111-a first force-bearing member; 112-a second force-bearing member; 12-a first cavity; 121-mounting grooves; 122 — a first opening; 123-support ring; 131-a rotating support plate; 132-rotating side plates;
20-a rotating member; 221-a first side panel; 222-a second side panel; 231 — a first groove; 232-a first mating groove; 241-a second projection; 242 — a second mating projection; 251-a first stop member; 252-a second stop member;
30-a second housing; 31-a second cavity; 310-a drive member; 311-a first drive member; 312-a second drive member; 32-a first baffle; 33-a magnetic field sensor; 34-embedded holes;
40-a flexible circuit board; 41-a bottom plate; 42-a fitting plate;
50-reinforcing plate.
Detailed Description
The technical solutions in the embodiments of the present disclosure will be clearly and completely described below with reference to the drawings in the embodiments of the present disclosure. It is to be understood that the described embodiments are merely illustrative of some, and not restrictive, of the embodiments of the disclosure. All other embodiments, which can be derived by a person skilled in the art from the embodiments disclosed herein without making any creative effort, shall fall within the protection scope of the present disclosure.
In the description of the present disclosure, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are used merely for convenience of description and for simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be considered as limiting the present disclosure. Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", may explicitly or implicitly include one or more of the described features. In the description of the present disclosure, "a plurality" means two or more unless specifically limited otherwise.
In the description of the present disclosure, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; may be mechanically connected, may be electrically connected or may be in communication with each other; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present disclosure can be understood by those of ordinary skill in the art as appropriate.
In the present disclosure, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise the first and second features being in direct contact, or may comprise the first and second features being in contact, not directly, but via another feature in between. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.
The following disclosure provides many different embodiments or examples for implementing different features of the disclosure. To simplify the disclosure of the present disclosure, specific example components and arrangements are described below. Of course, they are merely examples and are not intended to limit the present disclosure. Moreover, the present disclosure may repeat reference numerals and/or reference letters in the various examples, which have been repeated for purposes of simplicity and clarity and do not in themselves dictate a relationship between the various embodiments and/or arrangements discussed. In addition, the present disclosure provides examples of various specific processes and materials, but one of ordinary skill in the art may recognize applications of other processes and/or use of other materials.
In the existing optical assembly, a coil fixedly arranged on a base is generally energized, the coil generates an ampere force in a magnetic field, and due to the fixed arrangement of the coil, a reaction force of the ampere force acts on a driving magnet, so that the driving magnet arranged on a lens is driven, the lens is driven to displace, and the required vibration is generated. For example, when the optical lens in the optical assembly is a galvanometer, the supporting structure of the galvanometer is mostly fixed by using a reed and a screw, and the transmission precision of the galvanometer is affected by the forming tolerance and the assembling tolerance of the supporting structure of the reed; and in the case of a drop or impact, it is liable to cause permanent deformation and even breakage of the reed. The present disclosure proposes the following technical solutions based on the above technical problems:
referring to fig. 1 to 9, the present disclosure provides an optical assembly 400, which includes a rotation assembly 100, an optical lens 300 disposed on the rotation assembly 100, and a driving assembly 200 for driving the rotation assembly 100 and the optical lens 300 to rotate;
the rotating assembly 100 includes a first housing 10 and a rotating member 20, the rotating member 20 is located in the first housing 10, the rotating member 20 is rotatably connected to the first housing 10, and the rotating assembly 100 further includes at least one force-bearing member 110 located on the first housing 10.
The driving assembly 200 includes a second housing 30, the rotating assembly 100 is located in the second housing 30, the rotating assembly 100 is rotatably connected to the driving assembly 200 through the rotating member 20, and the driving assembly 200 further includes at least one driving member 310 located on the second housing 30.
The force receiving member 110 corresponds to the driving member 310, and the rotating assembly 100 rotates around a first direction or/and a second direction as an axis through the force receiving member 110 and the driving member 310, wherein the first direction is not parallel to the second direction.
The present disclosure improves the technical problem of poor transmission precision of the existing optical assembly 400 by providing at least one force-receiving member 110 on the first housing 10 and at least one driving member 310 on the second housing 30, and the rotating assembly 100 rotates around the first direction or/and the second direction as an axis through the force-receiving member 110 and the driving member 310, and simultaneously supports and rotates the optical assembly through the rotating member 20.
The technical solution of the present disclosure will now be described with reference to specific embodiments.
In the optical assembly 400 of the present disclosure, referring to fig. 1 to 5, the rotating assembly 100 may include at least a first force receiving member 111 and a second force receiving member 112 on the first housing 10, and the driving assembly 200 may include at least a first driving member 311 and a second driving member 312 on the second housing 30.
The first force receiving member 111 corresponds to the first driving member 311, the second force receiving member 112 corresponds to the second driving member 312, the rotating assembly 100 rotates around a first direction as an axis through the first force receiving member 111 and the first driving member 311, and the rotating assembly 100 rotates around a second direction as an axis through the second force receiving member 112 and the second driving member 312.
In this embodiment, please refer to fig. 1, the first direction may be an X direction, and the second direction may be a Y direction. The angle between the first direction and the second direction may be a non-zero angle. In the following embodiments, the angle between the first direction X and the second direction Y may be 90 °, that is, the first direction X is perpendicular to the second direction Y.
The present disclosure can improve the technical problem of poor transmission precision of the optical assembly 400 in the prior art by providing at least a first force receiving member 111 and a second force receiving member 112 on the first housing 10 and providing at least a first driving member 311 and a second driving member 312 on the second housing 30, wherein the rotating assembly 100 rotates around the first direction X by the first force receiving member 111 and the first driving member 311, and the rotating assembly 100 rotates around the second direction Y by the second force receiving member 112 and the second driving member 312, and the rotating member 20 simultaneously supports and rotates the optical assembly 400.
In the optical assembly 400 of the present disclosure, referring to fig. 5, the first housing 10 includes a first cavity 12, and the rotating member 20 is located in the first cavity 12. The first casing 10 includes a rotating support plate 131 and a rotating side plate 132 located at the periphery of the rotating support plate 131, and the rotating side plate 132 and the rotating support plate 131 at the periphery enclose the first cavity 12. In this embodiment, two adjacent rotating side plates 132 may be vertically disposed, that is, the first cavity 12 surrounded by the peripheral rotating side plates 132 may be a rectangular parallelepiped. Since the rotating side plates 132 are fixedly connected to the rotating support plate 131, two adjacent rotating side plates 132 may be disposed in a non-contact manner.
In this embodiment, referring to fig. 5, the first housing 10 further includes a mounting groove 121 located on the surface of the rotating support plate 131, and the optical lens 300 is embedded in the mounting groove 121. The first housing 10 further includes a first opening 122 located in the mounting groove 121, and the first opening 122 is communicated with the first cavity 12.
Referring to fig. 5, the mounting groove 121 is further provided with a support ring 123 surrounding the first opening 122, the optical lens 300 can be lapped on the support ring 123, and the optical lens 300 can be fixed to the support ring 123 in the mounting groove by a dispensing method.
In this embodiment, the size of the first opening may be specifically set according to the area of the light-emitting surface required by the optical assembly 400, and in this embodiment, it is only required to ensure that the optical lens 300 is embedded in the mounting groove.
In the present embodiment, the optical lens 300 may be, but is not limited to, one of a galvanometer, a lens, a reflector, and the like, and the galvanometer is taken as an example in the following embodiments for description.
In the optical assembly 400 of the present disclosure, referring to fig. 5, the rotating member 20 includes two first side plates 221 disposed along the first direction X and two second side plates 222 disposed along the second direction Y, the two first side plates 221 are disposed oppositely, the two second side plates 222 are disposed oppositely, and the two adjacent first side plates 221 and the two adjacent second side plates 222 are fixedly connected.
Wherein, a first rotating means is disposed on the first side plate 221, a second rotating means is disposed on the second side plate 222, the rotating member 20 is rotationally connected with the first casing 10 or the second casing 30 along the first direction X through the two first rotating means, and the rotating member 20 is rotationally connected with the first casing 10 or the second casing 30 along the second direction Y through the two second rotating means.
Referring to fig. 5, the first side plate 221 and the second side plate 222 correspond to the rotating side plate 132 of the first casing 10, and the first side plate 221 and the second side plate 222 are located inside the rotating side plate 132.
In the present embodiment, in order to ensure that the amplitudes of both sides of the rotating member 20 are the same during rotation, the first rotating means and the second rotating means are located in the central region of the corresponding first side plate 221 or second side plate. Referring to fig. 6, for the cross-sectional view of the section AA, the rotating member 20 is rotatably connected to the first housing 10 along the first direction X by two first rotating devices; referring to fig. 7, for the cross-sectional view of the section BB, the rotating member 20 is rotatably connected to the second housing 30 along the second direction Y by two second rotating devices.
In this embodiment, the present disclosure provides the rotating member 20 on the first housing 10 or/and the second housing 30 through a first rotating device and a second rotating device, and the first rotating device and the second rotating device simultaneously support and rotate the optical assembly, so that the rotating assembly 100 is rotatably connected to the driving assembly 200, instead of fixing the existing spring and screw, and the technical problem of poor transmission precision of the existing optical assembly 400 is improved.
In the optical assembly 400 of the present disclosure, please refer to fig. 5 to 9, in the first direction X, two of the first rotating devices are one of the first groove 231 facing into the first cavity 12 or the first protrusion (not shown) facing out of the first cavity 12; in the second direction Y, the two second rotation means are one of a second groove (not shown) facing into the first cavity 12 or a second protrusion 242 facing out of the first cavity 12.
The galvanometer structure of the present disclosure sets the first rotating device and the second rotating device as corresponding grooves or protrusions, and through the matching of the grooves and protrusions with the first casing 10 or the second casing 30, the rotating assembly 100 and the driving assembly 200 realize supporting and rotating connection at the same time. For example, in the solutions of fig. 5 to 9, the first rotation device is a first groove 231, the second rotation device is a second protrusion 241, two first grooves 231 in the X direction and two second protrusions 241 in the Y direction, so that the supporting and rotating connection between the rotation assembly 100 and the driving assembly 200 is realized, the fixation of the existing spring and screw is replaced, and the technical problem of poor transmission precision of the existing optical assembly 400 is improved.
In this embodiment, at least one of the two first rotating means or the two second rotating means is a protrusion facing out of the first cavity 12.
Referring to fig. 5 to 9, when the two first rotating devices are facing the first groove 231 in the first cavity 12 and the two second rotating devices are facing the second groove in the first cavity 12, the rotating member 20 is rotatably connected to the first housing 10, that is, only the rotating member is rotatably connected without supporting, and a complicated structure is required to support the rotating member 20. When at least one of the two first rotating means and the two second rotating means is a protrusion facing the outside of the first cavity 12, the structure corresponding to the first protrusion may be a first butt protrusion (not shown) on the second housing 30, and the structure corresponding to the second protrusion 241 may be a second butt protrusion 242 on the second housing 30, that is, the rotating assembly 100 and the driving assembly 200 may be supported and rotatably connected by the cooperation of the protrusion on the rotating member 20 and the butt protrusion on the second housing.
On the basis of the above embodiment, referring to fig. 5 to 9, when the first rotating device is a first groove 231 facing the first cavity 12, the first housing 10 further includes a first butt groove 232 corresponding to the first groove 231, the first butt groove 232 is embedded in the first groove 231, and the first groove 231 is rotatably connected to the first butt groove 232. Alternatively, when the second rotating device faces a second groove in the first cavity 12, the first housing 10 further includes a second butt groove (not shown) corresponding to the second groove, the second butt groove may be embedded in the second groove, and the second butt groove is rotatably connected to the second groove.
Referring to fig. 5 to 9, in the present embodiment, the first rotating device is configured as a first groove 231, and in order to ensure the rotational connection between the rotating member 20 and the first housing 10, the first housing 10 needs to be provided with a first abutting groove 232 corresponding to the first groove 231. The first groove 231 in this embodiment may be located on the second side plate 222 of the rotating member 20 and a fourth side plate disposed opposite to the second side plate 222, and the first docking groove 232 may be located on the rotating side plate 132 of the first housing 10, and since the first docking groove 232 needs to be embedded in the first groove 231, a radius of a circumscribed circle of the first docking groove 232 is smaller than a radius of a circumscribed circle of the first groove 231.
In this embodiment, the present disclosure realizes the rotation of the rotating member 20 about the first direction X by using one of the two first rotating means or the two second rotating means as a groove facing the first cavity 12 and by using the first groove 231 on the rotating member 20 to be rotationally connected with the butt groove on the first housing 10.
In the optical assembly 400 of the present disclosure, please refer to fig. 5 to 9, the second housing 30 further includes a second cavity 31, and the rotating assembly 100 is located in the second cavity 31; at least one first baffle 32 is disposed in the second cavity 31 and located between the first housing 10 and the rotating member 20, and the first baffle 32 is fixedly connected to the second housing 30.
In this embodiment, in the first direction X, a first butting protrusion corresponding to a first protrusion is disposed on the first baffle 32, the first protrusion is embedded in the first butting protrusion, and the first protrusion is rotatably connected to the first butting protrusion; or, in the second direction Y, a second butting protrusion 242 corresponding to the second protrusion 241 is disposed on the first baffle 32, the second protrusion 241 is embedded in the second butting protrusion 242, and the second protrusion 241 is rotatably connected to the second butting protrusion 242.
Referring to fig. 5 to 9, in the second direction Y, the second rotating component is the second protrusion 241, the second butting protrusion 242 corresponding to the second protrusion 241 is disposed on the second housing 30, and the second protrusion 241 and the second butting protrusion 242 cooperate to enable the rotating member 20 and the second housing 30 to rotate and support.
In the present embodiment, the second projection 241 may not protrude close to the rotation side plate 132 of the first housing 10 due to the presence of the first force receiving member 111 and the second force receiving member 112 on the rotation side plate 132.
Referring to fig. 5 to 9, in the second direction Y, a first baffle 32 is further disposed in the second cavity 31 between the first housing 10 and the rotating member 20, one of the first baffles 32 corresponds to one of the second protrusions 241, and since the first baffle 32 and the second housing 30 are fixedly disposed, the second butting protrusion 242 disposed on the first baffle 32 is engaged with the second protrusion 241, so that the rotating member 20 and the second housing 30 can be rotatably and supportingly connected.
In the present embodiment, the distance between the first baffle 32 and the rotating member 20 and the first housing 10 may be defined according to specific situations, and the disclosure is not particularly limited.
In this embodiment, since the second protrusion 241 is embedded in the second docking protrusion 242, a radius of a circumscribed circle of the second protrusion 241 is smaller than a radius of a circumscribed circle of the second docking protrusion 242.
In this embodiment, the present disclosure replaces the fixation of the existing spring and screw by making at least one of the two first rotating devices or the two second rotating devices be a protrusion facing the outside of the first cavity 12 and by buckling with the abutting protrusion disposed on the second housing 30, so that the rotating member 20 and the second housing 30 are supported and rotatably connected, thereby improving the technical problem of poor transmission precision of the existing optical assembly 400.
In the above embodiment, the surfaces of the first protrusion, the first butting protrusion, the second protrusion 241, the second butting protrusion 242, the first groove 231, the first butting groove 232, the second groove and the second butting groove may be, but are not limited to, hemispherical, that is, the convex surface of the protrusion makes rolling friction contact with the concave surface of the butting protrusion, and the concave surface of the groove and the protrusion of the butting groove make rolling friction contact.
In the optical assembly 400 of the present disclosure, the rotating member 20 further includes a first limiting member 251 located on the first side plate 221 and a second limiting member 252 located at a junction area of the first side plate 221 and the second side plate 222, the extending direction of the first limiting member 251 is close to the rotating support plate 131 of the first casing 10, and the extending direction of the second limiting member 252 is far away from the rotating support plate 131 of the first casing 10.
Referring to fig. 1 to 9, the number of the first limiting members 251 may be at least one, the number of the second limiting members 252 may be at least one, and the extending directions of the first limiting members 251 and the second limiting members 252 may be parallel to the third direction of the optical assembly 400.
In this embodiment, the first stopper members 251 may be respectively disposed on the two second side plates 222, and the second stopper members 252 may be respectively disposed at the intersection areas of the two adjacent first side plates 221 and the second side plates 222, that is, the second stopper members 252 may be used as supporting legs of the rotating member 20.
In this embodiment, the third direction may be a Z direction perpendicular to the first direction X and the second direction Y.
When the user uses projection equipment, if drop this projection equipment because of objective reason for this projection equipment receives certain impact force, under the effect of this impact force, current optical assembly easily makes the reed cause permanent deformation or fracture, leads to vibrating mirror's transmission precision to reduce or the inaccurate technical problem of location. In the optical assembly of the present disclosure, even if a certain impact force occurs, for example, an impact force in the + Z direction occurs, the existence of the first limiting member 251 enables a buffer gap to exist between the rotating member 20 and the first housing 10, and when an impact force in the-Z direction occurs, the existence of the second limiting member 252 enables a buffer gap to exist between the rotating member 20 and the second housing 30, thereby effectively avoiding the impact of falling or impact on the optical assembly.
In the optical assembly 400 of the present disclosure, referring to fig. 5, a vertical distance between the first position-limiting member 251 and the rotating support plate 131 of the first housing 10 is a first distance, a vertical distance between the second position-limiting member 252 and a fixed bottom plate of the second housing 30 is a second distance, and the first distance and the second distance are not equal to each other.
In the present embodiment, when the rotating member 20 rotates about the first direction X, due to the presence of the first stopper member 251, when the rotation angle is too large, the first member will interfere with the rotation support plate of the first housing 10, and therefore, when the rotating member 20 rotates about the first direction X, the rotation angle of the rotating member 20 is limited according to the size of the first pitch; when the rotating member 20 rotates about the second direction Y, the second stopper member 252 interferes with the fixed bottom plate of the second housing 30 when the rotation angle is too large due to the presence of the second stopper member 252, so that the rotation angle of the rotating member 20 is limited according to the magnitude of the second pitch when the rotating member 20 rotates about the second direction Y.
In this embodiment, the first pitch and the second pitch are not equal. And, the size of the first pitch and the size of the second pitch are not particularly limited in the present disclosure, and the rotation angle of the rotating member 20 may be defined according to the corresponding technical requirements, so as to perform the setting of the first pitch and the second pitch.
In the optical assembly 400 of the present disclosure, referring to fig. 5 to 9, the first force receiving member 111 and the second force receiving member 112 are fixed on the rotating side plate 132 of the first housing 10, one first force receiving member 111 corresponds to one first rotating device, one second force receiving member 112 corresponds to one second rotating device, and the first force receiving member 111 and the second force receiving member 112 are located between the first housing 10 and the second housing 30.
The first force-receiving member 111 is separated from the first driving member 311, the second force-receiving member 112 is separated from the second driving member 312, and the distance between the first force-receiving member 111 and the first driving member 311 is equal to the distance between the second force-receiving member 112 and the second driving member 312.
In this embodiment, the distance between the first force-receiving member 111 and the first driving member 311 and the distance between the second force-receiving member 112 and the second driving member 312 may not be equal, as long as the force-receiving member and the corresponding driving member do not interfere with each other during the rotation of the optical lens 300.
Referring to fig. 5 to 9, the first force-bearing member 111 and the second force-bearing member 112 may be fixed on the rotating side plate 132 of the first housing 10 by a dispensing method. The distance between the first force-receiving member 111 and the first driving member 311 and the distance between the second force-receiving member 112 and the second driving member 312 are not particularly limited in this disclosure, as long as the driving member and the force-receiving member do not interfere with each other when the rotating member 20 rotates.
In the present embodiment, the first driving member 311 and the second driving member 312 may include, but are not limited to, a metal coil for generating a magnetic field, and the first force receiving member 111 and the second force receiving member 112 may include, but are not limited to, a permanent magnet. In the solution of the present disclosure, the permanent magnet generates a magnetic field, and when the metal coil is energized, according to the left-hand rule, the metal coil will generate an ampere force, and since the driving assembly 200 where the metal coil is located is a fixed member, the rotating assembly 100 will be deflected by a reaction force of the ampere force. For example, the driving assembly 200 includes a first driving member 311 and a second driving member 312 distributed on a fixed side plate of the second housing 30, and the rotating assembly 100 includes a first force receiving member 111 and a second force receiving member 112 distributed on the rotating side plate 132 of the first housing 10, one of the force receiving members and one of the driving members constituting a transmission member of the optical assembly 400. When the first driving member 311 is energized, since the first force receiving member 111 is a permanent magnet, when the rotating member 20 rotates about the axis + X, the first force receiving member 111 receives an electromagnetic force in the + Z direction, and if a third force receiving member and a third driving member are provided on the opposite side of the first force receiving member 111, the third force receiving member receives an electromagnetic force opposite to the first force receiving member 111; similarly, when the rotating member 20 rotates around the axis-X, the first force receiving member 111 receives an electromagnetic force along the direction-Z, and if a third force receiving member and a third driving member are disposed on the opposite side of the first force receiving member 111, the third force receiving member receives an electromagnetic force opposite to the first force receiving member 111.
Next, when the second driving member 312 is energized, the corresponding metal coil generates a corresponding magnetic field, and since the second force receiving member 112 is a permanent magnet, the second force receiving member 112 receives an electromagnetic force in the + Z direction when the rotating member 20 rotates about the + Y axis, and the second force receiving member 112 receives an electromagnetic force in the-Z direction when the rotating member 20 rotates about the-Y axis.
In the present embodiment, the number of the above force receiving members and the above driving members is not specifically limited in the present disclosure. When there is a set of force-receiving member and driving member, it is possible to realize unidirectional rotation, for example, only the first force-receiving member 111 and the first driving member 311 exist, and the rotating member 20 can only rotate around the first direction X; when there are two sets of force-receiving members and driving members, and the two sets of force-receiving members and driving members are disposed adjacently, the rotating member 20 can rotate about the first direction X or/and the second direction Y, that is, the two axes are adjusted simultaneously.
Referring to fig. 5 to 9, the driving assembly 200 further includes a magnetic field sensor 33 located on the fixed side plate of the second housing 30, the magnetic field sensor 33 is located in the driving member, for example, the magnetic field sensor 33 is located in a metal coil. The magnetic field sensor 33 is configured to obtain a magnetic field between a corresponding metal coil and a corresponding permanent magnet, and obtain a distance between the permanent magnet and the metal coil according to the magnetic field.
The distance between the permanent magnet and the metal coil can be transmitted to the control end through the flexible circuit board 40 so as to output a feedback signal for controlling the current of the metal coil, and then the corresponding positive or negative compensation is given to the driving current of the metal coil, so that the more accurate transmission and positioning control of the lens is realized.
According to the technical solution of the above embodiment, the gap between the permanent magnet and the metal coil needs to be larger than a threshold value to ensure that there is no interference between the permanent magnet and the metal coil during the rotation of the rotating member 20; excessive clearance can affect the ampere force generated between the magnet and the coil; therefore, if the ampere force is too small, the ampere force can be compensated by increasing the size of the magnet and the number of turns of the coil winding, so that the lens can be more accurately driven and positioned.
In this embodiment, the metal coil may be a copper coil.
In the present embodiment, the magnetic field sensor 33 may be a hall sensor or a magnetoresistive effect sensor.
In the optical assembly 400 of the present disclosure, the second housing 30 further includes at least two embedded holes 34 located on the second housing 30, the first driving member 311 and the second driving member 312 are embedded in the embedded holes 34, and the first driving member 311 and the second driving member 312 are fixedly connected to the second housing 30 through the embedded holes 34.
Referring to fig. 5 to 9, the fixed side plate of the second housing 30 is further provided with four embedded holes 34, one embedded hole 34 corresponds to a driving member, and the driving member is fixedly connected to the second housing 30 through the embedded hole 34. The orthographic projection of the driving member on the embedding hole 34 is located in the embedding hole 34.
In the optical assembly 400 of the present disclosure, the centers of the first driving member 311, the first force receiving member 111, and the first rotation means are located on a first straight line, the centers of the second driving member 312, the second force receiving member 112, and the second rotation means are located on a second straight line, the first straight line is parallel to the first direction X, and the second straight line is parallel to the second direction Y.
In order to ensure the symmetry of the structure and the maximum effect of the magnetic field generated by the first driving member 311 and the second driving member 312, the centers of the first driving member 311, the first force-receiving member 111 and the first rotating means are located on a first straight line, and the centers of the second driving member 312, the second force-receiving member 112 and the second rotating means are located on a second straight line, so that the rotation of the rotating member 20 with the maximum angle can be realized under the action of the minimum magnetic field force.
In the optical assembly 400 of the present disclosure, the driving assembly 200 further includes a flexible circuit board 40 attached to the second housing 30, the flexible circuit board 40 includes a bottom plate 41 located on a side of the second housing 30 away from the optical lens 300 and at least two attaching plates 42 located on outer sides of the bottom plate 41, the attaching plates 42 are attached to the side housing of the second housing 30, and the attaching plates 42 cover the first driving member 311 and the second driving member 312.
In the present embodiment, the metal coil is disposed on the attachment plate, a circuit electrically connected to the metal coil is disposed on the attachment plate to input a corresponding control current to the metal coil, and a reaction force of an ampere force generated by the metal coil in the magnetic field acts on the rotating member 20 to drive the rotation of the rotating member 20.
In this embodiment, the height of at least one of the attachment panels 42 exceeds the height of the second housing 30. Referring to fig. 1 and 5, the attachment plate 42 exceeding the height of the second housing 30 is convenient for connecting with an external port or a main board for transmitting a corresponding control signal.
The flexible circuit board 40 in this embodiment is mainly used for inputting the driving current of the driving member and transmitting the position signal of the magnetic field sensor 33, so as to realize more precise transmission and positioning control of the lens.
In this embodiment, the driving member further includes a reinforcing plate 50 located outside the attachment plate 42, and the reinforcing plate 50 is used for protecting the corresponding flexible circuit board 40.
In the optical assembly 400 of the present disclosure, the material strength of the rotary member 20 is less than or equal to the material strength of the first housing 10 or/and the second housing 30; alternatively, the material density of the rotary member 20 is less than or equal to the material density of the first housing 10 or/and the second housing 30.
In the present embodiment, since there is rotational friction between the rotating member 20 and the first housing 10 or the second housing 30, and the rotation of the rotating member 20 in the optical assembly 400 of the present disclosure is a high-frequency, multiple-amplitude motion, friction loss occurs between the two when the optical assembly is operated for a period of time. That is, the present embodiment generally manages the roughness of the rotating surface to minimize wear, and can also reduce wear and friction by adding lubricating oil.
Secondly, if the material strength or the material density of the rotating member 20 is too large, the first housing 10 or the second housing 30 engaged with the rotating member 20 may be worn, and thus the material strength/density of the rotating member may be lower than that of the non-rotating member. For example, in the embodiment shown in fig. 5 to 9, the material strength of the surface of the second protrusion 241 or the first groove 231 is less than the material strength of the surface of the second docking protrusion 242 or the first docking groove 232.
In this embodiment, the first housing 10 and the second housing 30 may be made of, but not limited to, sheet metal, the rotating member 20 may be made of, but not limited to, plastic, and the sheet metal may be deformed by itself to complete the assembly and fastening between itself and the plastic. The material of the first housing 10 and the second housing 30 may be the same as the material of the rotary member 20.
In the present embodiment, since the transmission member in the above embodiments performs rotation of the rotating member 20 by using adjustment of magnetic field force, it is susceptible to an external magnetic field, and therefore, the material of the second housing 30 of the present disclosure may be cupronickel or 3-series stainless steel as a shielding material.
In this embodiment, the present disclosure improves the technical problem of poor transmission precision of the existing optical assembly 400 by providing at least a first force receiving member 111 and a second force receiving member 112 on the first housing 10 and providing at least a first driving member 311 and a second driving member 312 on the second housing 30, wherein the rotating assembly 100 rotates around the first direction X by the first force receiving member 111 and the first driving member 311, and the rotating assembly 100 rotates around the second direction Y by the second force receiving member 112 and the second driving member 312, and the rotating member 20 simultaneously supports and rotates the optical assembly.
The present disclosure also provides a projection apparatus comprising the above optical assembly.
The present disclosure provides an optical assembly and a projection apparatus, the optical assembly includes a rotation assembly, an optical lens and a driving assembly; the rotating assembly comprises a first shell and a rotating member positioned in the first shell, the rotating member is rotatably connected with the first shell, the driving assembly comprises a second shell, the rotating assembly is positioned in the second shell, and the rotating assembly is rotatably connected with the driving assembly through the rotating member. According to the optical assembly, the first shell is provided with the at least one stress member, the second shell is provided with the at least one driving member, the rotating assembly rotates by taking the first direction or/and the second direction as an axis through the stress member and the driving member, and the rotating member simultaneously supports and rotates the optical assembly, so that the technical problem that the existing optical assembly is poor in transmission precision is solved.
In the foregoing embodiments, the descriptions of the respective embodiments have respective emphasis, and for parts that are not described in detail in a certain embodiment, reference may be made to related descriptions of other embodiments.
The optical assembly and the projection apparatus provided by the embodiments of the present disclosure are described in detail above, and the principles and embodiments of the present disclosure are explained herein by applying specific examples, and the above description of the embodiments is only used to help understanding the technical solutions and the core ideas of the present disclosure; those of ordinary skill in the art will understand that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present disclosure.
Claims (16)
1. An optical assembly comprising a rotation assembly, an optical lens on the rotation assembly, and a drive assembly for driving the rotation assembly and the optical lens to rotate;
the rotating assembly comprises a first shell and a rotating member, wherein the rotating member is positioned in the first shell and is rotationally connected with the first shell, and the rotating assembly further comprises at least one stressed member positioned on the first shell;
the driving assembly comprises a second shell, the rotating assembly is positioned in the second shell, the rotating assembly is rotationally connected with the driving assembly through the rotating component, the driving assembly further comprises at least one driving component positioned on the second shell, the force-bearing component corresponds to the driving component, the rotating assembly rotates by the force-bearing component and the driving component by taking a first direction or/and a second direction as an axis, and the first direction is not parallel to the second direction;
wherein the first housing includes a first cavity, the rotating member being located within the first cavity;
the rotating member comprises two first side plates arranged along the first direction and two second side plates arranged along the second direction, the two first side plates are arranged oppositely, the two second side plates are arranged oppositely, and any two first side plates and any two second side plates are fixedly connected;
the first side plate is provided with a first rotating device, the second side plate is provided with a second rotating device, the rotating member is rotationally connected with the first shell or the second shell along the first direction through the two first rotating devices, and the rotating member is rotationally connected with the first shell or the second shell along the second direction through the two second rotating devices.
2. The optical assembly of claim 1, wherein the rotation assembly includes at least first and second force-receiving members on the first housing, and the drive assembly includes at least first and second drive members on the second housing;
the first force receiving member corresponds to the first driving member, the second force receiving member corresponds to the second driving member, the rotating assembly rotates about a first direction as an axis through the first force receiving member and the first driving member, and the rotating assembly rotates about a second direction as an axis through the second force receiving member and the second driving member.
3. The optical assembly of claim 2, wherein the first force-bearing member and the second force-bearing member are fixed to a rotating side plate of the first housing, a first force-bearing member corresponding to a first rotating means and a second force-bearing member corresponding to a second rotating means, the first force-bearing member and the second force-bearing member being located between the first housing and the second housing;
wherein the first force receiving member is disposed apart from the first driving member, the second force receiving member is disposed apart from the second driving member, and a distance between the first force receiving member and the first driving member is equal to a distance between the second force receiving member and the second driving member.
4. An optical assembly according to claim 3, wherein in the first direction, the two first rotation means are one of facing a first recess within the first cavity or facing a first protrusion outside the first cavity;
in the second direction, the two second rotation means are one of facing a second groove within the first cavity or facing a second protrusion outside the first cavity.
5. An optical assembly according to claim 4, wherein at least one of the two first rotation means or the two second rotation means is a protrusion facing out of the first cavity.
6. The optical assembly of claim 5, wherein when the first rotating means is a first groove facing into the first cavity, the first housing further comprises a first mating groove corresponding to the first groove, the first mating groove being embedded in the first groove, the first groove being rotationally connected to the first mating groove;
or, when the second rotating device faces the second groove in the first cavity, the first housing further includes a second butt groove corresponding to the second groove, the second butt groove is embedded in the second groove, and the second butt groove is rotatably connected to the second groove.
7. The optical assembly of claim 5, wherein the second housing further comprises a second cavity, the rotating assembly being located within the second cavity;
wherein, at least one first baffle plate positioned between the first shell and the rotating component is also arranged in the second cavity, and the first baffle plate is fixedly connected with the second shell;
in the first direction, a first butt joint bulge corresponding to the first bulge is arranged on the first baffle plate, the first bulge is embedded in the first butt joint bulge, and the first bulge is rotatably connected with the first butt joint bulge;
or, in the second direction, a second butting protrusion corresponding to the second protrusion is arranged on the first baffle plate, the second protrusion is embedded in the second butting protrusion, and the second protrusion is rotatably connected with the second butting protrusion.
8. The optical assembly of claim 3 wherein the rotation member further comprises a first stop member on the first side plate facing the first housing and a second stop member at an intersection of the first side plate and the second side plate facing the second housing, the first stop member facing parallel to the second stop member.
9. The optical assembly of claim 8, wherein the first stop member is vertically spaced from the first housing by a first distance, the second stop member is vertically spaced from the second housing by a second distance, and the first distance is not equal to the second distance.
10. The optical assembly of claim 3, wherein the second housing further comprises at least two embedded holes on the second housing, the first driving member and the second driving member are embedded in the embedded holes, and the first driving member and the second driving member are fixedly connected with the second housing through the embedded holes.
11. An optical assembly according to claim 10, wherein the centers of the first driving member, the first force-receiving member and the first rotation means are located on a first straight line, the centers of the second driving member, the second force-receiving member and the second rotation means are located on a second straight line, the first straight line being parallel to the first direction, the second straight line being parallel to the second direction.
12. The optical assembly according to any one of claims 2 to 11, wherein the driving assembly further comprises a flexible circuit board attached to the second housing, the flexible circuit board comprises a bottom plate located on a side of the second housing away from the optical lens and at least two attachment plates located on an outer side of the bottom plate, the attachment plates are attached to the side housing of the second housing and cover the first driving member and the second driving member.
13. The optical assembly of claim 12, wherein a height of at least one of the conforming plates exceeds a height of the second housing.
14. An optical assembly according to any one of claims 2 to 11, wherein the first and second drive members comprise metal coils for generating a magnetic field, and the first and second force-bearing members comprise permanent magnets.
15. An optical assembly according to any one of claims 1 to 11, wherein the material strength of the rotary member is less than or equal to the material strength of the first housing or/and the second housing; alternatively, the material density of the rotating member is less than or equal to the material density of the first housing or/and the second housing.
16. A projection device, characterized in that the projection device comprises an optical assembly according to any one of claims 1 to 15.
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| CN202110276954.5A CN112684654B (en) | 2021-03-15 | 2021-03-15 | Optical assembly and projection equipment |
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| CN112684654B true CN112684654B (en) | 2021-06-29 |
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